Head-forming machine.



F. D. STOWE.

HEAD FORMING MACHINE.

APPLICATION FILED APR.24| 1914:

1 ,2? 1,798. Patented July 9, 1918.

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F. D. STOWE.

HEAD FORMING MACHINE.

APPLICATION FILED APR.24, I914.

Patented July 9, 1918.

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W Wan (MM FLOYD D. STOWE, OF WILMINGTON, DELAWARE, ASSIGNOB TO E. I. DU FONT DE NEMOUBS POWDER COMPANY, OF WILMINGTON, DELAWARE, A. CORPORATION OF NEW JERSEY.

HEAD-FORMING MACHINE.

Specification of Letters Patent.

Patented July 9, 1918.

Application filed April 24, 1914.. Serial No. 834,083.

To all whom it may concern Be it known that I, FLOYD D. STowE, of Wilmington, in the county of Newcastle and in the State of Delaware, have invented a certain new and useful Improvement in Head-Forming Machines; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates particularly to a machine for forming the heads of kegs and especially heads on steel powder kegs.

The object of my invention is to provide a machine for forming the heads of kegs which operates with a great degree of effec tiveness and regularity, and the parts of which are arranged in a simple and advan tageous manner. While my invention is capable of embodiment in many different forms, for the purpose of illustration I have shown only one form thereof in the accompanying drawings, in which,

Figure 1 is a vertical section of an ap paratus made in accordance with my invention,

Fig. 2 punch,

Fig. 3 is a plan view of the stationary die and attached parts,

Fig. 4: is a vertical section through the neck-forming die and attached parts,

Fig. 5 'is a similar section through the neck-forming punch and attached parts, and

Fig. 6 is a sectional view of a keg head after being operated upon by the machine.

In the drawings I have shown a reciprocating plunger 1 which may be operated by a press in any suitable manner, said plunger 1 receiving a stem 2 attached to a main punch 3 having a forming ring 4 secured thereto by screws 5. This main punch 3 has attached to its center upon its under face a female lettering die 6 by means of screws 7. The upper pressure ring 8 is located around the edge of the forming ring 1, said pressure ring 8 having an inner flange 9, the movement of which is limited by a shoulder 10 on the outer edge of the upper forming ring 4. A plurality of recesses 11 is formed in the body of the punch 3 around its circumference to receive springs 12 to force the pressure ring 8 normally in a downward direction. Said pressure ring is screw-threaded at its outer edge so as to permit the same to be secured to a retaining ring 13, which has a shoulder 14 at 1ts top is a top view of the reciprocating to cooperate with an annular projection 15 upon the outer edge of the main punch 3. A screw 15 holds the retaining ring 13 in its adjusted position. The blank to be operated upon is received by a bolster plate 16 which may be secured to the press in any suitable manner. To the top of this bolster plate 16 there is attached by means of screws 17 a lower pressure ring 18. A guide plate 19 is attached to this lower pressure ring 18 by screws 20, and upon the upper surface of the guide plate 19 there are a plurality of stops 21 having slotted openings 22 through which pass screws 23 to secure the stops 21 in their adjusted positions. Inside of the lower pressure ring 18 there is a lower forming ring 24: which is yieldingly carried by plungers 25 extending upwardly through bushings 26 set in the bolster plate 16, and. which pins 25 extend downwardly to be supported upon a follow plate 27. This follow plate 27 is adapted to move upwardly and downwardly upon a stem 29, which is screw-threaded at its upper end into the bottom of the bolster plate 16, and which has a bolt head 30 at its lower end. Below the follow plate 27 there is a large body of rubber 31, which is supported from the bolt head 30 by an interposed washer 32. In order to letter the head at the same time that the forming operation is being carried out there is a male lettering die 33 attached by screws 3a to the bolster plate 16, said male lettering die being located within the forming ring 24. Furthermore, at the same time that the forming and lettering operations are carried out the neck is formed upon the head to receive an ear used for attaching the cover of the keg to the bung-hole. The neck is formed by providing a neck-forming punch 35 which is seated on the bolster plate 16 within the forming ring 2 1 and passing through the male lettering die 33. This neck-forming punch is held in place by screws 36 which pass through the bolster plate 16 and through a press bed 37 supporting the bolster plate 16. Around the exterior of the neck-forming punch 35 there is a stripper plate 38 which is normally moved upwardly beyond the level of the neck forming punch 35 by springs 39. The neck-forming punch 35 has a central opening 40 to permit the bung hole to be punched out of the head while it is being formed,

said central opening registering with a simitering in the face of'the lar opening 41 in the bolster plate 16. At I tached to the main punch 3 and passing through an opening in the female lettering die 6 there is a neck-forming die 42 which is held in place in the main punch 3 by a bung hole punch 43 having a shoulder 44 contacting with the neck forming die 42, said bung-hole punch 43 passing thence u wardly through the body of the-neck-forming die 42 and being held in place by a screw 45 .passing through the main die 3. Preferably the whole apparatus is located at an angle so that the formed blanks may be more readily removed, and in fact so that they-will fall out of the'machine by gravity as soon as released from the forming apparatus. As-the formed heads are released from'the forming apparatus they fall downwardly by gravity and are guided outward from the machine through a discharge aperture 46 by a guiding frame 47 which is attached to the rear end of the guide plate 19 by screws 48.

In the operation of my invention, prior to the operation of the machine to form the blanks into keg heads, itis desirable to adjust the lettering dies 6 and 33 so thatthey will bein perfect registry. This isoaccomplished by loosening the ,screw 15 and screwing up the retaining ring 13 until the springs 12 are pressed and the upperp-ressure ring 8 is moved above the level of the upper forming ring 4. The female dies 6 and the male die 33 may be nowadjusted so as to bring them in perfect registry without any interference from the yieldingly supported upperpressure ring 8. Flat blanks of the proper size for the heads of the steel kegs are fed downwardly between the sides of the guide plate 19 until the edges thereof ,rest against the stops 21, which have been previously adjusted into their correct positions. l/Vhen now the plunger 1 descends the upper pressure ring 8 will clamp the blank against the lower pressure ring 18 and as the plunger ldescends still further, the upper pressure ring 8 will yield through the presenceof the springs 12 until the upper forming ring 4 cooperates withwthe lower forming ring 24 to press the center of the flat-blank downwardly to give it the propersha-pe. During this forming operation, the lower pressure ring 24 will yieldowing to the presence-of the rubber plug 31 so as'toapply the pres- .sure to the blank progressively, and atthe same time, clamp-the blank tightly between the .two forming rings 4 and :24. At the end of this forming operation the female lettering dies 6 will contact with the male lettering dies 33 producing the required letkeghead. While these operations arebeing carried-outat the same time a bung-hole is punched in the head by the bung-hole punch 43 passing into the opening 40 in the neck-forming convex forming device,

4 punch .35, and the neck-forming punch 35 of theirubber block 31, thereby movingthe formed blank high enough to turned edge 'to extend above the stops 21 and the stripper plate 38, will in a similar manner have moved the blank up to a sufli cient height to cause it to clear the neckforming punch 35. The inclination of the apparatus is now such that as soon as the main die 3 is moved away from the formed blank, the latter will fall downwardly by gravity between the sides of theguide plate 19 until the formed blank passes downwardly through the opening 46 where it is received by any suitable receptacle or apparatus designed for conveying the formedblanks to the next operation in the manufacture of the steel kegs.

While I have described my invention above in detail, I wish it to be understood that many changes may be made therein without departing from the spirit of my invention.

I claim:

1. A head forming machine comprising a convex forming device, a concave forming device, said forming devices being located in an inclined position, and male and female cause its uplettering dies located in the forming dedevice, said forming devices being located in an inclined position,one ormore stops at the lower s1de Of'Sftld formingdevices, and male and female letterlng dies located in ;the forming devices.

4. A head forming machine comprising a convex forming device, a spring-supported concaveforming device, said forming .de: vices being located in an inclined position, one or more stops at the lower side of said forming devices, and male and female let-.

tering dies located in the formingdevices. 5. A head forming machlne comprising a convex formlng device, .a concave forming device, said forming devices being located in an inclined posltion,

and bung-hole and neck formlng devices in the said forming devices.

6. A head forming machinecomprisin ga a spr ng-supported concave forming device,

vices being located in an inclined position,

.said forming .de-

and bung-hole and neck forming devices in the said forming devices.

7 A head forming machine comprising a convex forming device, a concave forming device, said forming devices being located in an inclined position, one or more stops at the lower side of said forming devices, and bung-hole and neck forming devices in the said forming devices.

8. A head forming machine comprising a convex forming device, a spring-supported concave forming device, said forming devices being located in an inclined position, one or more stops at the lower side of said forming devices, and bung-hole and neck forming devices in the said forming devices.

9. A head forming machine comprising a convex forming device, a concave forming device, said forming devices being located in an inclined position, bung-hole and neck forming devices in the said forming devices, and a stripper ring associated with the neck forming devices.

10. A head forming machine comprising a convex forming device, a spring-supported concave forming device, said forming devices being located in an inclined position, bung-hole and neck forming devices in the said forming devices, and a stripper ring associated with the neck forming devices.

11. A head forming machine comprising a convex forming device, a concave forming device, said forming devices being located in an inclined position, one or more stops at the lower side of said forming devices, bung-hole and neck forming devices in the said forming devices, and a stripper ring associated with the neck forming devices.

12. A head forming machine comprising Copies of this patent may be obtained for five cents each by addressing the a convex forming device, a spring-supported concave forming device, said forming devices being located in an inclined position, one or more stops at the lower side of said forming devices, bung-hole and neck forming devices in the said forming devices, and a stripper ring associated with the neck forming devices.

13. A forming machine comprising upper and lower forming devices, upper and lower pressure rings, one of said pressure rings being spring-supported, and means for displacing the spring-supported pressure ring in opposition to the force of the spring, comprising a retaining ring screwthreaded to said pressure ring.

14:. A forming machine comprising upper and lower forming devices, supports for the same, upper and lower pressure rings, one of said pressure rings being spring-supported, and means for displacing the springsupported pressure ring in opposition to the force of the spring, comprising a retaining ring screw-threaded to said pressure ring, and extending over a shoulder on the support for one of the forming devices.

15. A forming machine comprising upper and lower keg head forming devices, upper and lower pressure rings, one of said pressure rings being spring-supported, and means for displacing the spring-supported pressure ring in opposition to the force of the spring.

In testimony that I claim the foregoing I have hereunto set my hand.

FLOYD D. STOWE.

Witnesses ARTHUR WRIGHT, L. Bnoonmcx.

Commissioner of Patents,

Washington, I). G. 

